*RJ45 coupler use to connect two male ethernet cables together and extend the length of ethernet cable,This Ethernet cable coupler can speed up to 10Gbps for connecting Cat7 or Cat6 ethernet cable. *These RJ45 couplers are metallic shielded to prevent electrical interference. Plug and play, work perfectly *This 8P8C female to female Ethernet extender adapter is compatible with Cat 7, Cat 6, Cat5e, Cat5 network patch cords, wallplates or blank patch panels.